Metal-bending machine



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- E. J. GEISSINGER.

METAL BBNDING MACHINE. No. 520,262. Patented May 22, 1894.

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METAL BENDING MACHINE.

Patented May 22,1894.

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E. J. GBISSINGER. METAL BBNDING MACHINE.

No. 520,262. Patented May 22, 1894,l

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UNITED STATES PATENT OFFICE.;

EDWARD J. GEISSINGER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OFONE-HALF TO THE GEORGE A. OHL da COMPANY, OF NEWARK, NEW

JERSEY.

'METAL-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 520,262, dated May 22,1894.

Application tiled July 7,1893. Serial No. 479,785. (Nomodel.)

To a/ZZ whom it may concern.-

Beit known that l, EDWARDJ. GEIssINGER, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and usefullmprovements inMetal-Bending Machines; and I do hereby declare the following to beafull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to theaccompanying drawings, and to letters ofreference marked thereon, which form a part of this specification.

The purpose of this invention is to provide a machine for the bending ofsheet metal, and has for its primary object to provide a machine of theclass in which the sheet metal fed into the machine by the operator isfirst clamped or held fast on the bed of the machine previous to thebending process, the machine being provided with means for-automatically operating a turning leaf or bar for bending the metal,said operations of first clamping or holding the sheet metal and thenbending it into any desired shape, following consecutively withoutremoving the sheet metal from the machine, it being desirable however,that a short time should elapse between said holding down operation andthe bending down operation when the machine does no work, certain partsof the machine being brought into their proper operative positions foracting upon the metal sheet and to properly bend the same into thedesired shape. In machines of this class as heretofore made, and whichhave been commonly termed cornice bending machines, the clamping leaf orbar and the turning leaf or bar work or operate simultaneously, which,althoughperfectly feasible and produces the desired end, necessitatesgreater power to operate the several parts of the machine. In

my present form of machine this objection has been overcome, there beingless power re quired, owing to lthe fact that the operations of theseveral devices embodied in my machine all operate in a consecutivemanner and therefore the force expended in doing the metal sheet,whereby the same means cause the operations of both said clamping leafor bar and that of the turning leaf or bar, not simultaneously asheretofore, but in a consecutive manner.

The invention is further designed to employ in connection with theturning leaf or bar, sockets, in which may be removablyV placed suitableformers of various patterns, which operate in conjunction with saidclamping leaf or bar to bend the metal into a desired shape.

`The invention further consists in certain other novel arrangements and.combinations of parts, such as will be more fully described hereinafterand as finally embodied in the clauses of the claim.

The form of construction selected to embody the invention in anoperative machine is illustrated in the accompanying sheets of drawings,in which- Figure 1 is a front view of my novel form of sheet metalbending machine. Figs. 2 and 3 are the two end views of the machine andFig. 4 is a horizontal section of the machine, taken on line y in Fig.1, the View clearly showing the bed of the machine in plan. Fig. 5 is anenlarged vertical section taken on line x in Fig. l, clearlyillustrating the normal and inoperative positions of the clamping leafor bar and the turning leaf or bar; and Fig. 6 is a similar view of theparts illustrated in said Fig. 5, with a piece of sheet metal placed inthe machine, the clamping leaf or bar having been brought down to clampthe metal sheet previous to the operation of the turning leaf or bar,which is still in its normal inoperative position. Fig. 7 is a detailview of a clutch wheel employed in connection with said turning leaf orbar, said view representing a sectional view of said wheel, to clearlyshow the arrangement and workings of the inner mechanism of said wheel,when in its normal in` operative position; and Fig. 8 is a like view ofsaid parts in their operative positions. Fig. 9 is a longitudinalsection of said wheel and apair of auxiliary wheels connected with saidclutch wheel, to more clearly show the arrangement of said wheels on theturning leaf pintles or journal pins. Fig. 10 is a detail view of one ofthe sockets employed in connection with the turning leaf or bar and aspring-actuated stop bar arranged therein, and Figs. 11 and 12 aredetail views of a gage and aformer respectively, which may be used inconnection with said sockets on the turning leaf. Fig. 13 is aperspective view of one form of a sheet metal article formed on themachine herein set forth.

Similar letters of reference are employed in each of the above describedviews, to indicate corresponding parts.

Before describing the construction and operation of the machine, it must'be stated, that the machine is well adapted for the bendingT vorforming of sheet metal into various shapes,

and is well adapted for the forming of sheet metal cornices, as well asthe sheet metal article illustrated in said Fig. 13.

The construction and operation of the sheet metal bending machine willnow be described, in order that a more complete understanding may be hadof the relation of the several operative devices shown in the drawings.The machine consists essentially of two main frame-supports A and A',which are preferably formed as illustrated in Figs. 1, 2, 3 and 4, andupon which are arranged the heads a and a. Each of which is providedwith a journal bearing a? and a3 respectively, and connecting said headsis a bed c4 of the machine. Said bed ispreferably formed as illustratedin Fig. 4, and is preferably provided with supporting arms b upon whichmay be placed any suitable number of adjustable gage stops b. Theclamping leaf or bar c is provided at its ends with suitable arms c',preferably provived with a hand-piece or lifting piece c2. Said arms care pivoted in bearing a5 on said heads a and a', as will be seen moreespecially from Figs. 5 and 6. Each arm c is provided on the sidethereof with a lug or stop c3, the purpose of which will be describedhereinafter. The turning leaf or bar e at the front of the machine isprovided with suitable journal pins or pintles e', which are arranged torotate in said bearings a2 and a3, said pins projecting beyond saidbearings and having on their free ends the clutch wheels E, as will beseen from said Figs. l toa inclusive. The turning leaf or bar e, whichmay be of any suitable form in cross-section, is provided in theffrontwith any desirable number of sockets g, and beneath each socket may bearranged a suitable spring g upon which is supported a stop-piece h, asillustrated in Figs. 1,.and 10, or a support h', as illustrated in Fig.11, or a former h2 of any desired shape or pattern, as illustrated inFig. 12.

The means for operating the clamping leaf or bar c and then the turningleaf or bar e consecutively, consists substantially of the clutch-wheelsE arranged on said journal pins e. Said wheels E, of which there may betwo, one on each side of the machine, (but only one may be used, ifdesired,) consist, as will be seen from Figs. 7, 8 and 9, of twohalf-sections 62 and e3. Said half-sections when bolted together bymeans of screws or bolts e, are formed with a peripheral groove e5 anda. chamber e6, which is formed with the edges e7 and es, substantiallyas shown. Within said chamber e6 and securely keyed on the journal pinor pintle e is a clutch device f which is of an outline corresponding tothat of the chamber e6, but its end-portions f and f2 are smaller thanthe space between the edges e7 and es, whereby said half-sections e2 ande3 are capable of a movement when the machine is operated, before theiredges e7 come in contact with the edges f3, and thereby operate thejournal pins e and hence the turning leaf or bar e. As will be seen moreespecially from Fig. 9, secured to said halfsection e3 of the wheel E,by means of screws or pins CZ is a grooved wheel d, and keyed on the endofthe journal pin e is another and smaller wheel cl2. The action of saidwheel cl2 is independent from theV action of the wheel d, as will bedescribed farther on. As will be seen from the several figures of thedrawings, said half-sections e2 and e3 forming the wheels E, are eachprovided with a recess eg which is arc-shaped, and into which norf mallyfits a wheel t' rotatively arranged on an arm t" pivotally connected oneach side of the machine to said heads ct and a hereinabove mentioned.Each arm t" is provided with an upright i2 which has a cut-away portiont3 fitting over said lug or stop c3 on each arm c of the clamping leafor bar c. 0f course, other means may be devised for connecting theseparts instead of those herein shown. From the back of each of said pivoted arms c extend the short arms c, to the ends of which are connectedsuitable springs c5, which are also attached to the frames of themachine. By this means, said wheels i will be normally held in therecesses e9 of the clutch-wheels E and the clamping leaf or bar c willbe held in its raised and inoperative position, as will be clearlyevident from Figs. 2, 3 and 5. Said half sections e2 and e3 forming theWheels E are operatively connected by means of chains j and j', or theequivalent thereof, to the operating treadles k and Wat either side ofthe machine, while the wheels CZ and cl2 are similarly connected bymeans of chains Z and Z', or their equivalent, to the ends of a smallrocker arm m pivotally attached to the end of the lever fn, which isalso pivoted in a bearing n on the frame of the machine. Said levers n,of which there may be one on each side of the machine, are provided withsuitable arms ln2, see Figs. 2 and 3, to the ends of which are connectedthe ends of suitable springs 0, the other ends of the said springs beingsecured to the frame of the machine. Each `chain j and 7" is connectedwith the treadles and Zt respectively therefore and may be passed overan idle pulley p rotatively arranged on the frame of the machine.

The operation of the machine in bending sheets of metal for thepurposesdesired, is as followsz-A piece of sheet metal is fed into themachine, either1 from the front or back of the machine, as maybe mostconvenient to the purposes required, and the edge of the metal sheet isbrought up against one of the stop-gages herein-above mentioned. Theoperator places his foot on either treadle la or lo and presses the samedown. Said treadles will pull on the chains j and j and cause the rotarymotion of the half-sections e2 and e3 and the wheel d in the directionindicated by the arrow in Fig. 7. During this time the half-sectionshave moved forward until their edges e7 in the chamber e6 have come incontact with the edges fof the clutch device f. In the meantime, thesmall wheel t' has been forced out of the recess e9, which brings thearms t" down, while the uprights 'i2 pull on the lugs c3 on the sides ofthe pivoted arms c 'carrying the clamping leaf or bar c. By this actionsaid clamping leaf, or b ar is firmly brought down upon the metal sheet,as will be seen from Fig. 6, causing the spring c4 to be pulled taut.During all this time the turning leaf or bar e has remained inoperative,but the edges e7 of the chamber e6 formed by the half-sections e2 ande3, now having come in contact with the edges f3 of the clutch-devices fkeyed to the journal pins e of the turning leaf or bar e, will cause therotation of said journal pins e and with it the wheel d2, as well as theother parts of` the clutchwheels E, to the positions indicated moreespecially in Fig. 8, thereby bringing the turning'leaf or bar e to itsraised position, as indicated in dotted outline in Fig. 6, and bendingthe metal into the desired shape. This action has caused the chains Zand Z to be partially wound upon the wheels d and cl2 and the levers nto be raised. Said levers n. being raised, will also cause the liftingof the short arm n2, whereby the spring o is stretched. After the bendin the sheet metal has been formed and the metal sheet is adjusted toreceive another bend, or is removed from the machine, as the case maybe, the foot of the operator is taken from the treadle andthe springs c4and o cause the return of the several operating devices to their normalinoperative positions, ready for another complete operation of clampingand then bending the sheet of metal.

In Figs. l, 2 and 3, I have shown an adjustable plate r arranged insliding contact with one of the frame-legs of the machine. Through aneye fr formed on said plate is passed a rod s, which is pivotallyconnected to the end of the turning leaf or bare, whereby the rotativemovement of said turning leaf or bar can be regulated and limited, aswill be clearly understood.

In the present drawings of the herein described machine, I have shown aset of operating clutch-wheels E, operating treadles and operativeconnections between said parts, on each side of the machine; but one ofsaid sets of mechanism may be dispensed with andthe machine will stillbe operative.

The machine can be operated from either side and by placing the supportsh in the sockets g, in place of the stops h, a support for the sheetmetal is formed on both sides of the machine, whereby the machine isreadily adapted for diierent classes of work. Said supports h may alsobe removed from the sockets gand formers h2 of any desirable shape orpattern may be placed in the sockets, whereby the machine is especiallyadapted for bending sheet metal into cornices or other like articles.

In some cases the machine is to be used for bending sheet metal into theform illustrated in Fig. 13, in which case the article to be formed ispreviously formed on the same'machine with small flanges projecting atright angles, or approximately so to form the edges of the article. Inorder that the sheet met-al article, when thus provided with theseflanges, may be bent into the shape shown in said Fig.l3, the turningleaf or bar c and the bed of the machine are provided with suitablerecesses or slots t, as will be seen from Fig. 4, into which saidiianges are placed and the operation of bending the sheet metal can besuccessfully completed without disturbing or jamming said flanges out ofposition.

It will be understood that many variations of constructions andarrangements vof the various parts herein described maybe made withoutdeparting from the scope of my invention. Hence, I do not wish to belimited to the exact forms of mechanism herein shown and described. Forinstance, the clutch wheels E and the wheels d and cl2 can bedifferently arranged and each worked independent of the other, and themachine still be operative, and other changes may be made in other partsof the mechanism of the machine. The essential feature of my machine istherefore, a downwardly moving clamping leaf or bar and a turning leafor bar, and an operative means for causing the operative working of eachindependent from the other and in a consecutive manner, and notsimultaneously one with the other, as in machines of this class asheretofore made. y

In some instances, I may provide the clamping or top leaf c with asuitably notched arm o8 andy upon the bed of the machine I pivotallyattach a lever c6 provided with a dogv or pawl c7, which is adapted tocome in holding contact with either of the notches in said arm e8. Thisarrangement can be used as a closing down handle by pulling on the leverc6, whereby the clamping leaf or bar can be firmly IOO IIO

locked in its clamping position upon the metal placed in the machine, aswill be clearly understood from an inspection of Fig. 5 of the drawings.

Having thus described my invention, what I claim isl. In a machine forbending sheet metal, the combination, of a clamping leaf or bar,pivotally arranged in the frame of the machine to clamp a piece of sheetmetal, a turning leaf or bar provided with journal pins arranged inbearings on the frame of the machine, adapted tobeturned against saidpiece of sheet metal, and means on said journal pins to work saidclamping leaf or bar and also said turning leaf or bar, to cause saidoperations of the clamping leaf or bar and said turning leaf or bar, tofollow consecutively without removing the metal sheet from the machine,for the purposes set forth.

2. In a machine for bending sheet metal, the combination, of a clampingleaf or bar, pivotally arranged in the frame of the machine to clamp apiece of sheet metal, a turning leaf -or bar provided with journal pinsarranged in bearings on the frame of the machine, adapted to be turnedagainst said piece of sheet metal, and means, consisting essentially ofa clutch wheel or wheels E arranged on the ends of said journal pins onthe turning leaf or bar, and means operated by said clutch wheels E forcausing the clamping action of said clamping leaf or bar and that of theturning leaf or bar, whereby the action of said clamping leaf or bar andthat of the turning leaf or bar follow consecutively without removingthe metal sheet from the machine, for the purposes set forth.

3. In a machine for bending sheet metal, the combination of a clampingleaf or bar pivotally arranged in the frame of the machine, to clamp apiece of sheet metal, a turning leaf or bar provided with journal pinsarranged in bearings on the frame of the machine, adapted to be turnedagainst said piece of sheet met-al, and means, consisting essentially ofa clutch-wheel or wheels E arranged on the ends of said journal pins onthe turning leaf or bar, said clutch-wheel having an arc-shaped recessin its periphery, a wheel t in normal engagement with said recess, a le-Ver t" pivotally arranged on the frame of the machine, and an upright orrod t2 connecting said lever t" with the pivotally arranged clampingleaf or bar, whereby, the said operations of the clamping leaf or barand of the turning leaf or bar follow consecutively without removing themetal sheet from the machine, for the purposes set forth.

4. In a sheet metal bending machine, the combination, with a pivotedclamping leaf or bar, and a turning leaf or bar provided with journalpins arranged in bearings in the machine, of a clutch-wheel E on one orboth of said journal pins, consisting essentially, of half-sections e2and e3, forming, when secured together, a chamber e6 having edges e7 ande8,

and mechanism for operating said clutch-' wheel, whereby the operationsof said clamping leaf or bar and that of the turning leaf or bar followconsecutively without removing the metal sheet from the machine,substantially as and for the purposes set forth.

5. In a sheet metal bending machine, the combination, with a pivotedclamping leaf or bar, and a turning leaf or bar providedwith journalpins arranged in bearings in the machine, of a clutch-wheel E on one orboth of said journal pins, consisting essentially of half-sections e2and e3, forming, when secured together, a chamber es having edges e7 andes, and a clutch device f in said chamber firmly secured on the journalpin and having portions f and f2 and edges f3 adapted to engage withsaid edges e7, an arc-shaped recess in the periphery of the wheel E, aWheel 'iin normal engagement with said recess, a lever t" pivotallyarranged on the frame of the machine, and an upright or rod i2connecting said `lever t with the pivotally arranged clamping bar orleaf, and mechanism for operating saidclutch-wheel, whereby, saidoperations of the clamping leaf or bar and that of the turning leaf orbar follow consecutively without removing the metal sheet fromthemachine, substantially as and for the purposes set forth.

6. In a machine for bending sheet metal, in combination, the hereindescribed clutchwheel E and the wheels cl and d2, of a treadle and achain, connecting said treadle with the clutch-wheel to operate thesame, a pivoted lever ot, and chains, connecting said lever with saidwheels d and d2, an arm n2 connected with said lever n, and a spring o,all arranged, substantially as and for the purposes set forth.

7. In a machine for bending sheet metal, in combination, the hereindescribed clutchwheel E and the wheels d and d, of a treadle and achain, connecting said treadle with the clutch-wheel to operate thesame, a pivoted lever n, a rocker bar m on said lever, and chains,connecting the ends of said rocker bar with said Wheels d and d2, an armn2 connected with said lever n, and a spring o, all arranged,substantially as and for the purposes set forth.

8. In a sheet metal bending machine, in combination, a clamping leaf orbar, and a turning leaf or bar, a clutch-wheel E connected with saidturning leaf or bar, consisting of hollow sections secured together andlcs forming a chamber e6 having edges e7 and e,

9. In a sheet metal bending machine, in combination, with a clutch WheelE and means for operating the same, of a clamping leaf or bar c havingarms c' and bearings in which said arms are pivoted, arms t" and rods i2connecting said arms i with said arms c', whereby, when said arms z" areoperated, said clamping leaf or bal;` is brought down upon the metalsheet, substantially as and for the purposes set forth.

10. 4In a sheet metal machine, the combination, of the bed a4 of themachine, aclamping leaf or bar and a turning leaf or bar, both arrangedto turn in bearings in said bed, a treadle, means connected with saidtreadle for operating said clamping leaf or bar and said turning leaf orbar, rods b secured on said bed a4 and extending rearwardly therefrom,and gages arranged to slide on said rods b, substantially as and for thepurposes set forth.

l1. In a sheet metal bending machine, the turning leaf or bar e, socketsg arranged on said turning leaf or bar, and aspring beneath each socket,substantially as and for the purposes set forth.

12. In a sheet metal bending machine, in

combination, a turning leaf or bar, and the frame of the machine, anadjustable plate r, and a rod s connected with said plate and saidturning leaf or bar to limit the turning movement of said leaf or bar,substantially as and for the purposes set forth.

13. In a sheet met-al bending machine, in combination, with the bed ofthe machine, and a clam ping leaf or bar arranged on said bed, a lockingdevice connected with said bed and clamping leaf or bar, to hold thelatter in its clamping position, said locking device consistingessentially, of a notched arm on said clamping leaf or bar, and a leverpivoted to said bed of the machine and the latter provided with a dog orpaWl adapted to engage with said notched arm, and mechanism foroperating the same, substantially as and for the purposes set forth.

In testimony ihatI claim the invention set forth above I have hereuntoset my hand this 28th day of June, 1893.

EDWARD J. GEISSINGER.

Witnesses:

WM. GREW, WILLIAM E. ToLAN.

